{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["enabling technology", "material", "engineering feature", "biomedical", "process characterization", "concept or principle"], "input": "Ring rolling is a flexible forming process used to produce seamless rings with various dimensions and cross sections ."}
{"enabling technology": [], "material": [], "engineering feature": ["dimensions"], "biomedical": [], "process characterization": [], "concept or principle": ["cross sections"]}